CN107878422A - The brake pedal emulator of line control brake system - Google Patents
The brake pedal emulator of line control brake system Download PDFInfo
- Publication number
- CN107878422A CN107878422A CN201710855599.0A CN201710855599A CN107878422A CN 107878422 A CN107878422 A CN 107878422A CN 201710855599 A CN201710855599 A CN 201710855599A CN 107878422 A CN107878422 A CN 107878422A
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- China
- Prior art keywords
- brake pedal
- shell
- piston head
- chamber
- axially
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/06—Disposition of pedal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
- B60T8/4072—Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking
- B60T8/4081—Systems with stroke simulating devices for driver input
- B60T8/409—Systems with stroke simulating devices for driver input characterised by details of the stroke simulating device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/82—Brake-by-Wire, EHB
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Braking Elements And Transmission Devices (AREA)
- Regulating Braking Force (AREA)
- Mechanical Control Devices (AREA)
Abstract
Brake pedal emulator extends and is connected between supporting construction and brake pedal along center line.Emulator includes hydraulic cylinder, piston head and changeable flow linker.The shell of cylinder engages with one in the structure and the pedal.Piston head is engaged with another in supporting construction and brake pedal, and changeable flow linker is carried between shell and piston head.First chamber is determined by the first lateral spacing of shell and piston head at least in part, and second chamber is limited by the second, opposite, side of shell and piston head at least in part.Piston head is relative to body seal and slip, and changeable flow linker is adapted to provide for the fluid communication between first chamber and second chamber, its axial displacement with piston head and change.
Description
Technical field
The present invention relates to a kind of brake-by-wire (BBW) system, and more specifically to a kind of braking of BBW systems
Device pedal emulator.
Background technology
The traditional services brakes of vehicle steps on brake pedal to activate based on hydraulic pressure typically by driver
The system of fluid, the brake pedal generally activate master cylinder.And then master cylinder is to leading to the braking of each wheel for being adjacent to vehicle
Hydraulic fluid in a series of hydraulic fluid lines of associated actuators at device is pressurizeed.This hydraulic braking can be by liquid
Governor assembly supplement is pressed, the hydraulic regulation device assembly promotes ANTI LOCK, traction control and intact stability Enhanced feature.
During anti-lock, traction control and stability enhanced mode of operation, the master cylinder that can manually activate by hydraulic pressure using being adjusted
The supplement actuating pressure gradient of section device assembly supply carrys out primary operational wheel drag.
When the plunger of master cylinder is stepped on by brake pedal so that during motor car wheel brake, driver runs into pedal resistance.This
Resistance be probably due to wheel at actual braking force, hydraulic fluid pressure, the mechanical resistance in booster/master cylinder, act on
The power of back-moving spring on brake pedal and the combination of other factorses.Therefore, driver habit in and it is expected in vehicle
Operation during feel that this resistance normally occurs.Unfortunately, ' sensation ' of conventional brake pedal, which can not adjust, comes
Meet the expectation of driver.
Latest developments in brakes include BBW systems, and it is via the electric signal generally generated by Vehicle Controller
Actuated vehicle brake.Braking moment can be applied to wheel drag, without carrying out direct hydraulic pressure connection with brake pedal
Knot.BBW systems can be the attachment device part of the more conventional brake fluid system of substitution (that is, and/or), or can be complete
Substitute brake fluid system (that is, pure BBW systems).In any BBW systems, it is necessary to the system that Simulation of Driver is got used to
Dynamic device pedal ' sensation '.
Accordingly, it is desired to provide brake pedal ' sensation ' a kind of adjustable and that more conventional brakes can be simulated
Brake pedal emulator.
The content of the invention
In one exemplary embodiment of the present invention, brake pedal emulator extends and is connected to along center line
Between supporting construction and brake pedal.Brake pedal emulator includes hydraulic cylinder, piston head and changeable flow linker.Outside
Shell engages with one in supporting construction and brake pedal.Piston head connects with another in supporting construction and brake pedal
Close, and changeable flow linker is carried between shell and piston head.First chamber is at least in part by shell and piston head
First lateral spacing is determined, and second chamber is limited by the second, opposite, side of shell and piston head at least in part.Piston head and shell into
Sealing and sliding relation, and changeable flow linker is constructed and arranged to provide the fluid between first chamber and second chamber
Connection, its axial displacement with piston head and change.
In another exemplary embodiment of the present invention, the BBW systems for vehicle include what is engaged with supporting construction
Brake pedal and brake pedal emulator.Brake pedal emulator is constructed and arranged to making when the pressure is exerted
Apply reaction force on dynamic device pedal, and including power induction installation, damping unit and rubbing device.Power induction installation is constructed
Be arranged on brake pedal apply reaction force the first power, its function as brake pedal stroke and change.
Damping unit is constructed and arranged to apply on brake pedal the second power of reaction force, and it is as at least brake pedal
The function of rate of displacement and change.The rubbing device is constructed and arranged to apply on brake pedal the hysteresis of reaction force
Power.
According to reference to accompanying drawing obtain to the described in detail below of the present invention, features above of the invention and advantage and its
Its feature and advantage is readily apparent.
Brief description of the drawings
Further feature, advantage and details only by means of example appear in embodiment it is described in detail below in, this is retouched in detail
Refer to the attached drawing is stated, wherein：
Fig. 1 is that have schematic diagram of the BBW systems as the vehicle of a non-limiting example according to the disclosure；
Fig. 2 is the schematic diagram of BBW systems；
Fig. 3 is the schematic diagram of the brake pedal component of BBW systems；
Fig. 4 is the schematic diagram of the second embodiment of brake pedal component；
Fig. 5 is the perspective view of the 3rd embodiment of brake pedal component；
Fig. 6 is the cross section of the emulator of Fig. 5 brake pedal component；
Fig. 7 is the cross section of the rubbing device of emulator；
Fig. 8 is the cross section for the damping unit for being illustrated the emulator in extension state；
Fig. 9 is the cross section of the damping unit during being illustrated the application in retracted mode and brake pedal；
Figure 10 is the cross section for the damping unit for being illustrated the deenergized period in retracted mode and brake pedal；
Figure 11 is the curve map of the power distribution of the power induction installation of the BBW systems as the function of brake pedal stroke；
Figure 12 is the curve map of the damped coefficient distribution of BBW systems；And
Figure 13 is the cross section of the fourth embodiment of emulator.
Embodiment
Describe that only there is exemplary nature below and be not intended to the limitation disclosure, its application or purposes.It should be understood that
, in whole accompanying drawing, corresponding drawing reference numeral indicates identical or corresponding part and feature.As used herein, term
Module and controller refer to process circuit, and it is (shared, special that it can include application specific integrated circuit (ASIC), electronic circuit, processor
With or in groups) and perform the memories of one or more softwares or firmware program, combinational logic circuit and/or the work(be provided
Other suitable components of energy property.
According to the exemplary embodiment of the present invention, Fig. 1 is the schematic diagram of vehicle 20, and the vehicle can include dynamical system 22
(that is, engine, speed changer and differential mechanism), multiple swivel wheels 24 (that is, illustrated four) and BBW systems 26, the BBW
System can include brake assembly 28, brake pedal component 30 and the controller 32 for each corresponding wheel 24.It is dynamic
Power is 22 to be suitable to drive at least one wheel 24, thus promotes the vehicle 20 on surface (for example, road).BBW systems 26 are matched somebody with somebody
It is set to the speed of overall slower vehicle 20 and/or makes vehicle stop motion.Vehicle 20 can be any automobile, truck, lorry,
Sport vehicle is suitable for any self-propelled of carriage load or towed means of transport.
Each brake assembly 28 of BBW systems 26 can include brake 34 and be configured to the actuator of operational brake
36.Brake 34 can include clamp (not shown), and can be any class for including disk brake, drum brake etc.
The brake of type.As non-limiting example, actuator 36 can be electric hydaulic brake actuator (EHBA) or can be based on
Can be from the other actuators for the electrical input signal actuating brake 34 that controller 32 receives.More specifically, actuator 36 can be with
It is or including can act on the electric signal received and therefore convert the energy into the fortune for the movement for controlling the brake 34
Dynamic any kind of motor.Therefore, actuator 36 can be arranged to the clamp that generation is passed to such as brake 34
Electric hydaulic pressure dc motor.
Controller 32 can include computer based processor (for example, microprocessor) and computer-readable and writable
Storage medium.In operation, controller 32 can be by indicating path (referring to arrow 38) that operator brake is intended to from braking
Device pedal assembly 30 receives one or more electric signals.And then controller 32 can handle such signal, and at least partly
Ground is based on these signals, and passage path (referring to arrow 40) exports tele command signal to actuator 36.Based on any various cars
State, for each wheel 24, the command signal for being directed to each wheel 24 can be identical or can be different
Signal.Path 38,40 can be wireline pathway, wireless path or combination.The non-limiting example of controller 32 can be with
ALU including performing arithmetic sum logical operation；Electronic control unit, it extracts from memory, decodes and performed
Instruction；And the array element using multiple parallel computation elements.The other examples of controller 32 can include engine and control
Module and application specific integrated circuit.Should be it is further envisioned that with understanding, controller 32 can include redundant manipulator, and/or be
System can include other redundancies, to improve the reliability of BBW systems 26.
With reference to figure 2 and 6, brake pedal component 30 can include brake pedal 42 and brake pedal emulator 44.
Brake pedal 42 can be supported by fixed structure 46 and with it into mobile relation.A non-limiting example is illustrated as,
Brake pedal 42 can be pivotally engaged around the first pivot axis 48 with fixed structure 46.Emulator 44 can be compact
, single same axle unit, it is supported by brake pedal 42 and fixed structure 46 and extended therebetween.More specifically, emulation
Device 44 can be pivotally engaged at the second pivot axis 50 with brake pedal, and can at the 3rd pivot axis 52 with
Fixed structure 46 is pivotally engaged.Second pivot axis 50 and the 3rd pivot axis 52 can be spaced with the first pivot axis 48
Open, and all three pivot axis 48,50,52 can be substantially parallel to each other.
Referring to figs. 2 to 4, the emulator 44 of brake pedal component 30 can be ' passive ' emulator in following meaning：
The possible uncontrolled device 32 of emulator 44 is direct or actively controls, but is configured to simulate the row of more conventional brake fluid system
For and/or ' sensation '.Emulator 44 can include lagging device 53, damping unit 54 and power induction installation 56, with driver
At least expectation of simulating brake device pedal 42 or expected ' sensation ' during operation.Lagging device 53 is constructed and arranged to and driven
The power that the person of sailing applies compares the hysteresis for generally promoting pedal reset force.That is, when observing that display pedal resets force curve and pedal
When applying the power of force curve with pedal travel plot, hysteresis is reset force and the application of any specific location of pedal travel
Difference between power.Damping unit 54 is constructed and arranged to generally produce damping force, and it is that driver steps on brake pedal 42
Speed function.Power induction installation 56 produces the induction force (for example, spring force) of the function as brake pedal displacement.
With reference to figure 2,5 and 6, emulator 44 may further include coupling compoonent 58, and it will at the second pivot axis 50
Brake pedal 42 is operably connected to device 53,54,56.The displacement transducer 60 of emulator 44 is configured to measurement brake and stepped on
At least one displacement (for example, linear or angular displacement) in plate 42 and coupling compoonent 58.Emulator 44 may further include
At least one pressure sensor 62, it is generally oriented at the reaction side of device 53,54,56 (that is, close to the 3rd pivot axis
52) pressure applied with measurement (referring to Fig. 2 and 6).It is contemplated that and understand, pressure sensor 62 can be pressure transducing
Device, the power being integrated in the base component 70 of emulator 44 sensing load cell, or be configured or adapted to accurately detect, survey
Amount or the other suitable pressure sensors for otherwise determining the pressure or imparting brake pedal applied.
With reference to figure 2, in order to optimize system reliability, emulator 44 can include the difference positioned at brake pedal component 30
More than one displacement transducer 60 of opening position.Similarly, emulator 44 can include more than one pressure sensor 62 (i.e.,
Force snesor), it is configured to for example export redundant signals to more than one controller to promote the fault-tolerant of sensor fault.Grasping
In work, controller 32 is configured to when brake pedal 42 is activated by driver, passage path 38 and from respective sensor 60,62
Receive displacement signal (referring to arrow 64) and pressure signal (referring to arrow 66).Controller 32 handles displacement signal 64 and pressure letter
Numbers 66, then passage path 40 send appropriate command signal 68 to brake actuator 36.
With reference to figure 3 to 5, the emulator 44 of brake pedal component 30 may further include direct around pivot axis 52
It is pivotally connected to the base component 70 of fixed structure 46.Lagging device 53, damping unit 54 and power induction installation 56 generally may be used
To be supported between base component 70 and coupling compoonent 58 and operationally on the base component and the coupling compoonent.
In operation, when brake pedal 42 is stepped on by driver, coupling compoonent 58 is generally moved to closer to base component 70, and is filled
Put 53,54,56 to retract and/or compress therebetween, so as to produce desired brake pedal ' sensation '.
Referring to Fig. 4 to 7, an example of lagging device 53 can be telescopic shell, its can generally encase device 54,
56.Housing 53 can include the first tubular part 55 and the (example of the second tubular part 57 along center line C each other in telescopic relation
Such as, cylinder), and radially and the circumferentially continuous sealing being slidably disposed between part 55,57 or o rings 59.First
Tubular part 55 can be rigidly fixed to base component 70 and from base component 70 and towards pivot axis 50 axially outwards
It is prominent.Second tubular part 57 can be rigidly fixed to coupling compoonent 58 and from coupling compoonent 58 and towards the axle of pivot axis 52
To outwards prominent.In this example, the end of part 55,57 overlaps each other so that the first tubular part 55 is from the second tubulose
Part 57 is partially radially outside positioning.
In operation, the radially elastic compression, therefore be directed to brake pedal 42 between tubular part 55,57 of o rings 59
Displacement a certain degree of frictional force and/or resistance (that is, pedal actuation and reset) are produced in either direction.In an implementation
Example in, tubular part 55,57 can not be real cylinder, on the contrary, in part 55,57 it is at least one can have with
Part it is axially extending relative to center line C and change diameter (not shown).In this embodiment, when base component 70 and connection
When structural member 58 moves axially towards each other and away from each other under the actuating of brake pedal 42, o rings 59 are with becoming much larger degree
Nature is flexibly returned in compression.This variable force (that is, the bias force of o rings) is radially applied to part 55,57 by o rings 59
Between, therefore change as the function of brake pedal displacement.The distribution of this power represents hysteresis.
With reference to figure 3, Fig. 4 and 6, an example of power induction installation 56 can be resiliency compressible, the spring of spiral, its
With the opposed end being supported on relative base component 70 and coupling compoonent 58.In operation, power induction installation 56 can be with
Applying power, the mechanical resistance stop the actuating of brake pedal 42 and also promote brake pedal when driver discharges brake pedal
Reset.Other non-limiting examples of power induction installation 56 include elastomer foam, wavy spring and can produce usual work
For any other device of the power of the function of brake pedal displacement.
With reference to figure 4,6 and 8, damping unit 54 can be designed to step on brake during falling in whole brake pedal
Plate applies constant power when applying constant speed or rate of displacement.One example of this ' constant force ' damping unit 54 can be with
It is hydraulic cylinder, there is the aperture for being used for flowing hydraulic fluids and/or air or opening 69 (that is, device is in fluid communication, referring to figure for it
4).Another non-limiting example of damping unit 54 can include being designed to as pedal displacement increases and when brake is stepped on
Increase the device of power when plate 42 is operated with constant speed (referring to Fig. 8).This ' variable force ' damping unit can be passive
And it is only dependent upon brake pedal position and/or displacement.One example of ' passive variable force ' damping unit can include tool
There is the hydraulic cylinder of multiple openings 69, the plurality of opening depends on brake pedal position and individually continuously exposed.Damping unit
54 other non-limiting examples can include frcition damper and can produce function usually as pedal actuation speed
Power any other device.Although illustrated with (i.e., side by side) relation parallel to each other (referring to Fig. 3) and with relation concentrically with respect to one another
Illustrate (referring to Fig. 4), but it is further envisioned that with understanding, the orientation of device relative to each other can take any a variety of shapes
Formula.
With reference to figure 8, the hydraulic cylinder example of damping unit 54 is in axial expansion/extension state by explanation.In fig.9, hinder
Buddhist nun's device 54 is illustrated as being in compressive state.Damping unit 54 can include the first wall 72, the second wall 74, shell 76, flow
Linker 78 and reciprocating-piston first 80.Shell 76 can circumferentially be continuous around center line C, and may furthermore is that substantially
Cylinder.First wall 72 and the second wall 74 axial separation, and generally can radially-inwardly position and be connect with shell 76 each other
Close.Piston head 80 is sealed slidingly against to shell 76, and suitable for axially being moved back and forth between wall 72,74.
The variable first chamber 82 of damping unit 54 includes border, and it is generally radially limited by the axial component of shell 76
And axially between the first wall 72 and the first side of piston head 80.Variable second chamber 84 (referring to Fig. 9) includes border,
It is generally radially limited by another axial component of shell 76, and axially between piston head 80 second, opposite, side with
Between second wall 74.
The piston rod 86 of damping unit 54 can link to piston head 80 and coupling compoonent 58 and extend therebetween.Flow
Linker 78 can be a part for ' passive variable force ' damping unit, it include limit inner passage 90 it is axially extending in
Blank pipe 88 and the multiple openings 69 for the connection of wall 94 for passing through pipe.Opening 69 can axially be distributed along pipe 88 so that can parameter
The opening 69 of amount is in fluid communication between first chamber 82 and passage 90.The pipe 88 of piston rod 86 and flow linker 78
Can be with the axial overlap of bar 86 that is located radially outward from pipe 88.Should be it is further envisioned that can be distributed in understanding, opening 69
It can change with the axial movement of piston head 80 in any a variety of orientations of flow cross section.In one embodiment, open
Mouth 69 can be made up of an axial slender opening.
Piston rod 86 is constructed and arranged to the second wall 74 into sealing relationship and axially slides through the second wall 74,
The shape of second wall 74 can be annular.Piston rod 86 can include piston head 80 being connected into coupling compoonent 58 simultaneously
Maintain any various structure types of the fluid communication between second chamber 84 and passage 90.Such as and as described, bar 86
Can be hollow tube, it surrounds the axial component concentric locating of pipe 88 and between passage 90 and second chamber 84
At least one hole being in fluid communication or opening 96.Similar to annular second wall 74, the shape of piston head 80 can be annular.Flow
The pipe 88 of linker 78 can be constructed and arranged to piston head 80 into sealing relationship and generally axially slidably by this
Piston head.
With reference to figure 9 and in the operation of damping unit 54, when brake pedal 42 is applied by driver (referring to arrow
98), piston head 80 is moved (that is, from the angle of diagram) towards left side, the overlapping increase between pipe 88 and piston rod 86, and with the
Two chambers 84 become big, and first chamber 82 diminishes.During this Volume Changes, fluid (for example, hydraulic fluid) is from first chamber 82
Flow through multiple openings 69 of (referring to the arrow 100 in Fig. 9) flow linker 78 and enter passage 90.Fluid flows through from passage 90
In piston rod 86 or neighbouring opening 96 and enter expand second chamber 84.It is living with continuing to for brake pedal 42
Chock plug 80 is used to covering and sealing increasing opening 69, may need to apply bigger power to make piston head 80 so as to produce
Continue to move the damping effect (that is, into first chamber 82) towards left side.
With reference to figure 10 and in the operation of damping unit 54, after brake pedal 42 is discharged and during pedal resets
(referring to arrow 102), piston head 80 are moved (that is, from the angle of diagram) towards right side, the overlapping drop between pipe 88 and piston rod 86
It is low, and as second chamber 84 diminishes, first chamber 82 becomes big.During this Volume Changes, fluid (for example, hydraulic fluid) from
Second chamber 84 flows through (referring to the arrow 104 in Figure 10) opening 96 and enters passage 90.Fluid flows through different numbers from passage 90
The opening 69 of amount simultaneously enters the first chamber 82 expanded.Continue to reset with brake pedal 42, piston head 80 is used to expose
With the increasing opening 69 of exposure, so as to further help the reset of brake pedal 42.
As being best seen in Fig. 8 and 10, piston head 80 can include pad stack 108, its can be annular shape with
With 76 direct sliding contact of shell.It can be the non-return associated with least one axially extending opening 110 that pad, which stacks 108,
The integral part of valve, or otherwise include the interval fluid that the check-valves is used between first chamber 82 and second chamber 84
Connection.More specifically, during the reset of brake pedal 42, due to the positive differential pressure across piston head 80, pad stacks 108 can
It can open.When pad, which stacks 108, to be opened, additive fluid can flow (referring to the arrow 112 in Figure 10) from second chamber 84
And enter first chamber 82.With reference to figure 9 and when applying brake pedal, the pressure differential across piston head 80 can be negative, cause
Pad stacks 108 and closed.
With reference to figure 9, damping unit 54 can include auxiliary chamber's component 114, it include can be end cap component 116,
Air supported head 118 and the spring 120 that can be compression and/or helical spring.The auxiliary chamber 122 of Volume Changes can axially limit
It is scheduled between the wall 72 of air supported head 118 and first, and is axially limited by shell 76.Spring 120 can be axially disposed at structure
Between part 116 and air supported head 118.Air supported head 118 can seal with shell 76 and with shell 76 into sliding relation.In operation
And power is rapidly applied to brake pedal 42, the volume of auxiliary chamber 122 with very high speed and can be overcome with fluid
The inflow (referring to arrow 124) of the biasing force of spring 120 and increase.
With reference to figure 12, an example of the power distribution of power induction installation 56 is generally used as brake pedal stroke T by explanation
Function, be illustrated as brake pedal power F and the brake pedal stroke T of driver's application in the graph.Solid arc
Or curve 71 represents target distribution, and dotted line 73 represents external world's (that is, tolerance) of target distribution.Power induction installation 56 can design
Into meeting this target distribution.
With reference to figure 11, an example of damped coefficient distribution generally by function of the explanation as brake pedal stroke T,
Brake pedal stroke T is illustrated as in curve map and represents target distribution with the solid arcs of damped coefficient D. or curve 75, and it is empty
Line 77 represents external world's (that is, tolerance) of target distribution.Similar to power induction installation 56, damping unit 54 can be designed to meet this
Target distribution.It is contemplated that and understand, from target force and damping distribution data together with the target tolerances established in advance
(that is, border) can be programmed to be used for various processing functions in controller 32.Should it is further envisioned that and understand, in various journeys
On degree, damping unit 54 can be adjustable, wherein the controlled device 32 of this adjustability controls, for example to meet Figure 11 and 12
Pre-programmed distribution.In addition, Figure 12 damped coefficient curve can be multiple resistances each associated with the aspect of vehicle modeling
One in Buddhist nun's coefficient curve.It is further noted that damped coefficient D is the function of pedal position, and damping force is that pedal applies
The function of speed and pedal position.
With reference to figure 13, the second embodiment of power induction installation is illustrated, wherein in addition to it with the addition of single quotation marks suffix, with
The similar element of first embodiment has similar identification numeral.The power induction installation 56' of second embodiment is included along center
Multiple helical springs (that is, three helical springs for being illustrated as 130,132,134) that line C is axially stacked and at least one
Shuttle (that is, two shuttles for being illustrated as 136,138).Each shuttle 136,138 can be for overall annular shape and by structure
Make and be arranged to move axially relative to center line C.Upon assembly, the first spring 130 and second spring 132 are supported on the first shuttle
On 136 sons, and the spring 134 of second spring 132 and the 3rd is supported on the second shuttle 138.Each spring 130,132,134 can be with
With unique or different spring constant, it can be chosen so as to realize that desired power distribution is bent based on brake pedal displacement
Line.
The advantages of disclosure and benefit include the related damping design of passive position, with sensing as housing with protection
The lagging device of the dual-use function of device and damping unit, allow similar to vacuum boosting brake system pedal reset answer
Position damping release characteristic, and for improving the compact coaxial design of packaging.Further advantage may include and vacuum boosting system
Simulating brake device deck, damping and the hysteresis for uniting similar.Another advantage includes control brake pedal damping in real time
Brakes, and damping unit, the damping unit not only control the size of the damping force of the function as pedal speed, and
And the damping force (that is, damped coefficient) of the function as brake pedal stroke can also be controlled to match desired damped coefficient
Curve.
Although emulator 44 has previously been described as ' passively ' (that is, uncontrolled device 32 controls), in other realities
Apply in example, emulator 44 can at least partly ' active '.For example, any one or more in device 53,54,56 can
To be active, and therefore generally controlled device 32 controls at least to simulate the ' sense of desired pedal either individually or in combination
Feel '.
Although describing the present invention by reference to exemplary embodiment, it will be understood by those skilled in the art that
Various changes can be made in the case of not departing from the scope of embodiment and equivalent can be substituted by its element.In addition, not
In the case of the essential scope for departing from embodiment, many change so that particular case or material are suitable to religion of the invention can be made
Lead.Therefore, it is desirable to the invention is not restricted to disclosed specific embodiment, but the present invention is by including falling the institute in application range
There is embodiment.
Claims (10)
1. a kind of brake pedal emulator, its extend along center line and be connected to supporting construction and brake pedal it
Between, the brake pedal emulator includes：
Hydraulic cylinder, it includes and a shell engaged in the supporting construction and the brake pedal and the support
The piston head of another engagement in structure and the brake pedal, and be carried between the shell and the piston head
Changeable flow linker；And
Wherein first chamber is determined by the first lateral spacing of the shell and the piston head at least in part, and second chamber is at least partly
Ground is limited by the second, opposite, side of the shell and the piston head, and the piston head into sealing and slides pass with the shell
System, and the changeable flow linker is constructed and arranged to provide the fluid between the first chamber and the second chamber
Connection, the fluid communication change with the axial displacement of the piston head.
2. brake pedal emulator according to claim 1, wherein the changeable flow linker includes pipe, the pipe
Axially extension, be spaced radially inwardly from and with the shell into fixed correlation with the shell.
3. brake pedal emulator according to claim 2, wherein the piston head is shaped as annular for described
Pipe axially receives.
4. brake pedal emulator according to claim 3, wherein the hydraulic cylinder includes engaging simultaneously with the shell
And the second wall being disposed radially inwardly from the shell, and wherein described second chamber is axially defined in the piston head and institute
State between the second wall.
5. brake pedal emulator according to claim 4, wherein the changeable flow linker is included along described
The wall of pipe is axially distributed and passed through a series of openings that the wall of the pipe connects.
6. brake pedal emulator according to claim 5, wherein the hydraulic cylinder includes engaging simultaneously with the shell
And the first wall being disposed radially inwardly from the shell, and wherein described first chamber is axially defined in first wall and institute
State between piston head.
7. brake pedal emulator according to claim 5, wherein the piston head connects with the seal of tube and slip
Touch.
8. brake pedal emulator according to claim 1, further comprises：
Telescopic shell, it is axially coextensive with the hydraulic cylinder and is radially outward set with one heart from the hydraulic cylinder, and
Wherein described telescopic shell is engaged with the supporting construction and the brake pedal and extended therebetween.
9. brake pedal emulator according to claim 8, wherein the telescopic shell includes the first tubular part, its
Engaged with one in the supporting construction and the brake pedal；Second tubular part, it is from first tubular part
At least partially radially inwardly set and engaged with another in the supporting construction and the brake pedal；It is and close
Sealing, it carries out sliding contact between first tubular part and second tubular part.
10. brake pedal emulator according to claim 8, further comprises：
Helical spring, it engages with the supporting construction and the brake pedal and axially extended therebetween, and with institute
State telescopic shell and the hydraulic cylinder is concentrically disposed with and is disposed radially within therebetween.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/282145 | 2016-09-30 | ||
| US15/282,145 US20180093648A1 (en) | 2016-09-30 | 2016-09-30 | Brake pedal emulator of a brake-by-wire system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107878422A true CN107878422A (en) | 2018-04-06 |
Family
ID=61623726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710855599.0A Pending CN107878422A (en) | 2016-09-30 | 2017-09-20 | The brake pedal emulator of line control brake system |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20180093648A1 (en) |
| CN (1) | CN107878422A (en) |
| DE (1) | DE102017122080A1 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10108218B2 (en) * | 2016-05-25 | 2018-10-23 | Fontaine Modification Company | Brake assembly for retrofitting a motor vehicle with a dual-position brake system |
| DE102019101646A1 (en) | 2019-01-23 | 2020-07-23 | HELLA GmbH & Co. KGaA | Pedal emulator for a vehicle |
| DE102019101754A1 (en) | 2019-01-24 | 2020-07-30 | HELLA GmbH & Co. KGaA | Pedal for a vehicle and system for a vehicle with a pedal |
| US11414057B2 (en) * | 2019-04-03 | 2022-08-16 | GM Global Technology Operations LLC | Retractable pedal assembly for a vehicle |
| DE102019114199A1 (en) * | 2019-05-27 | 2020-12-03 | Methode Electronics Malta Ltd. | Device for a force-displacement emulator of a brake pedal with a force and displacement sensor and a corresponding method |
| EP3828046A1 (en) * | 2019-11-29 | 2021-06-02 | MICO Inc. | A valve assembly and a system having a deadband state |
| KR20230130676A (en) * | 2021-01-13 | 2023-09-12 | 시티에스 코포레이션 | Vehicle Pedal Resistance and Damper Assemblies |
| US20220314939A1 (en) * | 2021-04-02 | 2022-10-06 | Cts Corporation | Vehicle brake pedal with linear pedal resistance and rotary dampener/position sensor assemblies |
| WO2022251456A1 (en) | 2021-05-26 | 2022-12-01 | KSR IP Holdings, LLC | Passive pedal force emulator pedal assembly |
| DE102021119439A1 (en) | 2021-07-27 | 2023-02-02 | Zf Active Safety Gmbh | Pneumatic brake pedal module |
| DE102021119443A1 (en) | 2021-07-27 | 2023-02-02 | Zf Active Safety Gmbh | brake pedal module |
| DE102021119438A1 (en) | 2021-07-27 | 2023-02-02 | Zf Active Safety Gmbh | Pneumatic brake pedal module |
| DE102022204056A1 (en) | 2022-04-27 | 2023-11-02 | Continental Automotive Technologies GmbH | Suspension strut for a brake pedal and brake pedal assembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4949590A (en) * | 1988-02-17 | 1990-08-21 | Automotive Products Plc | Hydraulic cylinder assembly |
| US5865510A (en) * | 1995-10-11 | 1999-02-02 | Lucas Industries Public Limited Company | Brake pedal actuator for motor vehicle and actuation unit therefor |
| CN103287417A (en) * | 2012-02-29 | 2013-09-11 | 株式会社爱德克斯 | Vehicle brake device |
| CN103547494A (en) * | 2011-05-23 | 2014-01-29 | 罗伯特·博世有限公司 | Stroke simulator, master cylinder having stroke simulator, and brake system using master cylinder |
| CN103950443A (en) * | 2014-04-14 | 2014-07-30 | 同济大学 | Pedal feeding active control type electronic hydraulic braking system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060163941A1 (en) * | 2002-07-09 | 2006-07-27 | Von Hayn Holger | Brake by-wire actuator |
| ES2279277T3 (en) * | 2003-10-20 | 2007-08-16 | Dura Global Technologies, Inc. | BRAKE PEDAL SIMULATOR FOR A "BRAKE CABLE" BRAKING SYSTEM. |
| US9079570B2 (en) * | 2009-01-15 | 2015-07-14 | Continental Teves Ag & Co. Ohg | “Brake-by-wire” type brake system |
| KR102016357B1 (en) * | 2014-10-28 | 2019-08-30 | 주식회사 만도 | Pedal simulator |
| US20180037207A1 (en) * | 2016-08-08 | 2018-02-08 | GM Global Technology Operations LLC | Vehicle brake-by-wire system with a brake pedal emulator override device |
| US20180043865A1 (en) * | 2016-08-11 | 2018-02-15 | GM Global Technology Operations LLC | Braking system for a vehicle with an adjustable brake pedal assembly |
-
2016
- 2016-09-30 US US15/282,145 patent/US20180093648A1/en not_active Abandoned
-
2017
- 2017-09-20 CN CN201710855599.0A patent/CN107878422A/en active Pending
- 2017-09-22 DE DE102017122080.1A patent/DE102017122080A1/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4949590A (en) * | 1988-02-17 | 1990-08-21 | Automotive Products Plc | Hydraulic cylinder assembly |
| US5865510A (en) * | 1995-10-11 | 1999-02-02 | Lucas Industries Public Limited Company | Brake pedal actuator for motor vehicle and actuation unit therefor |
| CN103547494A (en) * | 2011-05-23 | 2014-01-29 | 罗伯特·博世有限公司 | Stroke simulator, master cylinder having stroke simulator, and brake system using master cylinder |
| CN103287417A (en) * | 2012-02-29 | 2013-09-11 | 株式会社爱德克斯 | Vehicle brake device |
| CN103950443A (en) * | 2014-04-14 | 2014-07-30 | 同济大学 | Pedal feeding active control type electronic hydraulic braking system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102017122080A1 (en) | 2018-04-05 |
| US20180093648A1 (en) | 2018-04-05 |
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Application publication date: 20180406 |